Display screen with a graphical user interface



FIG. 1 is a front elevation view of a first embodiment of a display screen with a graphical user interface showing our new design;

FIG. 2 is a front elevation view of a second embodiment of a display screen with a graphical user interface showing our new design;

FIG. 3 is a front elevation view of a third embodiment of a display screen with a graphical user interface showing our new design; and,

FIG. 4 is a front elevation view of a fourth embodiment of a display screen with a graphical user interface showing our new design.

The perimeters of the display screen and graphical user interface are understood to be flush. The broken lines illustrate the display screen and form no part of the claimed design. The broken lines illustrate portions of the graphical user interface and form no part of the claimed design. Additionally, the “Aetna Pay” header shown in a stylized checkered pattern is in broken line and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface, as shown and described. 